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Finding the Fourth Proportional to 238,511.34, 357,745.14 and 80,721.72

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Solution

The fourth proportional to 238,511.34, 357,745.14 and 80,721.72 is: 121,075.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,511.34 : 357,745.14 = 80,721.72 : x
  2. Step 2: Convert to fraction form
    238,511.34/357,745.14 = 80,721.72/x
  3. Step 3: Cross multiply
    238,511.34x = 357,745.14 × 80,721.72
  4. Step 4: Simplify right side
    238,511.34x = 28,877,803,022.44
  5. Step 5: Solve for x
    x = 28,877,803,022.44/238,511.34
  6. Step 6: Final answer
    x = 121,075.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.